Dell PowerConnect 5448 User's Guide - Page 29
Hardware Components, Power Supplies - fan
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The following table describes the system LED indications. Table 2-3. System LED Indications LED Diagnostics (DIAG) Fan (FAN) Redundant Power Supply (RPS) Main Power Supply (PWR) Temperature (TEMP) Color Green Flashing Green Static Red Static Green Static Red Static Green Static Red Static OFF Green Static OFF Red OFF Red Static Description The system is currently running a diagnostic test. The system passed the diagnostic test. The system failed the diagnostic test. The device fans are operating normally. One or more fans are not operating. The redundant power supply is currently operating. The redundant power supply is not operating. The redundant power supply is not currently operating. The main power supply is currently operating normally. The main power supply is not currently operating. The main power supply has failed The system temperature is normal. The system temperature is too high. Hardware Components Power Supplies The device has an internal power supply unit (AC unit) and a connector to connect the device to an external power supply unit (DC unit). The external unit provides redundancy and is called an RPS unit. To power up the device, only one power supply is required. Operation with both power supply units is regulated through load sharing. Load sharing is where the device power requirements are divided between the two power supplies. If one power supply has an outage, the second power supply automatically continues providing power to the whole device. Power supply LEDs indicate the power supply status. For more information on LEDs, see "LED Definitions" on page 27. Hardware Description 29